<template>
  <div>
    <!-- 导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区 -->
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        show-icon
        center
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 标签页 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          tab-position="left"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expand-trigger="hover"
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTabledate"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTabledate"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>

          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash";

export default {
  data() {
    return {
      activeIndex: "0",
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: "",
        attrs: [],
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", tigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", tigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", tigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", tigger: "blur" },
        ],
        goods_cat: [{ required: true, message: "请选择商品分类" }],
      },
      // 商品分类信息
      cateList: [],
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      // 动态、静态参数列表
      manyTabledate: [],
      onlyTabledate: [],
      // 上传的URL地址
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      // 图片绑定请求头
      headerObj: { Authorization: window.sessionStorage.getItem("token") },
      // 图片预览地址
      previewPath: "",
      previewVisible: false,
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    // 获取商品列表
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status != 200)
        return this.$message.error("获取商品信息失败！");
      this.cateList = res.data;
      // console.log(res);
    },
    // 商品分类不为3级时触发
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    // 标签页切换时判断商品分类是否填写
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类!");
        return false;
      }
    },
    // 标签页切换点击事件
    async tabClicked() {
      if (this.activeIndex === "1") {
        // console.log("访问的时商品参数面板");
        const { data: res } = await this.$http.get(
          `categories//${this.cateId}/attributes`,
          {
            params: { sel: "many" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败！");
        }
        // 字符串分割成数组
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTabledate = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories//${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态参数列表失败！");
        }
        this.onlyTabledate = res.data;
      }
    },
    // 处理图片的预览效果
    handlePreview(file) {
      //   console.log(file);
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    // 图片的删除
    handleRemove(file) {
      // 1.获取将要删除图片的临时路劲
      // 2.从pics数组中，找到对应的索引值
      // 3.使用splice方法，从pics数组中移除
      //   console.log(file);
      const filePath = file.response.data.tmp_path;
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath);
      this.addForm.pics.splice(i, 1);
      //   console.log(this.addForm);
    },
    // 图片上传成功后调用
    handleSuccess(response) {
      // 1.拼接得到一个图片信息对象
      // 2.将图片信息对象，push到pics数组中
      //   console.log(response)
      const picInfo = { pic: response.data.tmp_path };
      this.addForm.pics.push(picInfo);
      //   console.log(this.addForm);
    },
    // 添加商品
    add() {
      //   console.log(this.addForm);
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项！");
        }
        // 深拷贝后（依赖lodash），把数组转换成字符串
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        // 处理动态属性
        this.manyTabledate.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(""),
          };
          this.addForm.attrs.push(newInfo);
        });
        // 处理静态属性
        this.onlyTabledate.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          };
          this.addForm.attrs.push(newInfo);
        });
        form.attrs = this.addForm.attrs;
        console.log(form);

        const { data: res } = await this.$http.post("goods", form);
        if (res.meta.status !== 201) {
          return this.$message.error("商品添加失败！");
        }
        this.$message.success("添加商品成功！");
        this.$router.push("/goods");
      });
    },
  },
  computed: {
    // 当前选中的三级分类的ID
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>

<style scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>